Amy C. Portmore, MD
Internal Medicine Physician · San Carlos, CA
Amy C. Portmore, MD is an internal medicine physician with a practice address in San Carlos, California, and NPI 1386792455, issued on Jan 8, 2007. Check the license (California G79688, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Amy C. Portmore
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G79688 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 Industrial RD, San Carlos, CA 94070
- Phone
- (650) 596-4000
- Enumerated
- Jan 8, 2007
- Record last updated
- Jun 4, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 301 Industrial RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Katrina Abad, AGPCNP-BCNurse Practitioner1306394952
- Maryam Adeel, M.D.Family Medicine Physician1285163998
- Jennifer Akazawa, MDFamily Medicine Physician1457971772
- Sarah Alamillo, PA-CPhysician Assistant1306349352
- Judith Alderman, N.P.Nurse Practitioner1407225121
- Omar Aljundi, NPNurse Practitioner1811464811
Verify Amy C. Portmore in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G79688Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
288 Medicare Part D claims for 71 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Amlodipine Besylate36 claims
- Atorvastatin Calcium36 claims
- Levothyroxine Sodium23 claims
- Omeprazole19 claims
- Lisinopril18 claims
- Rosuvastatin Calcium13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Amy C. Portmore among 17,696 internal medicine physician records in California
Amy C. Portmore, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2020 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 internal medicine physician records list a practice address in San Carlos
They are 18 of the 1,015 NPPES records with a practice address in San Carlos, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Carlos → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rebecca Ashe, MDSan Carlos, CA 940701003980798
- Ritu BansalSan Carlos, CA 940701003096777
- Suzanne Dey, MDSan Carlos, CA 940701548362270
- Charlotte Gonzales, M.D.San Carlos, CA 940701891758892
- David Jacoby, MDSan Carlos, CA 940701295715134
- Kenneth Lin, MDSan Carlos, CA 940701972546976
- Martha Mejia, M.D.San Carlos, CA 940701871520155
- Shanti Perkins, M.D.San Carlos, CA 940701598844516
Common questions
What is Amy C. Portmore, MD's NPI number?
Amy C. Portmore, MD's National Provider Identifier (NPI) is 1386792455, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Amy C. Portmore, MD located?
The NPPES record lists a practice address at 301 Industrial RD, San Carlos, CA, 94070. Phone: (650) 596-4000. Providers update this record themselves, so call before visiting.
How can I verify Amy C. Portmore, MD's license?
NPPES lists California license number G79688, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Amy C. Portmore, MD prescribe under Medicare Part D?
In 2024, Amy C. Portmore, MD had 288 Medicare Part D claims for 71 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.